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Cancrinite, Nepheline, Aegirine-augite, Eudialyte


Cancrinite : Na6Ca2[(CO3)2|Al6Si6O24] · 2H2O, Nepheline : (Na,K)[AlSiO4], Aegirine-augite : (Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6, Eudialyte : Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2

Photo Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Unusualy coloured green cancrinite form triangular grain in the center of the specimen. It nothing replace and is obviously primary mineral of this urtite-pegmatite. Associating minerals are grey nepheline, black aegirin-augite (aegirin-I) and minor pink eudialyte. Astrophyllite replacing aegirin is unvisible on this side of the sample. Specimen size is 5x3x2.5 cm. Collected in the end of 80th. Pavel M. Kartashov collection (#0208) and photo.

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